5261 libm should stop using synonyms.h

@@ -25,11 +25,11 @@
 /*
  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
  * Use is subject to license terms.
  */
 
-#pragma weak hypot = __hypot
+#pragma weak __hypot = hypot
 
 /* INDENT OFF */
 /*
  * Hypot(x, y)
  * by K.C. Ng for SUN 4.0 libm, updated 3/11/2003.